public void Constructor_Exceptions ()
{
HostFileChangeMonitor monitor;
string relPath = Path.Combine ("relative", "file", "path");
var paths = new List<string> {
relPath
};
AssertExtensions.Throws<ArgumentException> (() => {
monitor = new HostFileChangeMonitor (paths);
}, "#A1");
paths.Clear ();
paths.Add (null);
AssertExtensions.Throws<ArgumentException> (() => {
monitor = new HostFileChangeMonitor (paths);
}, "#A2");
paths.Clear ();
paths.Add (String.Empty);
AssertExtensions.Throws<ArgumentException> (() => {
monitor = new HostFileChangeMonitor (paths);
}, "#A3");
AssertExtensions.Throws<ArgumentNullException> (() => {
monitor = new HostFileChangeMonitor (null);
}, "#A4");
paths.Clear ();
AssertExtensions.Throws<ArgumentException> (() => {
monitor = new HostFileChangeMonitor (paths);
}, "#A5");
}
static CacheItemPolicy GetCacheItemPolicy()
{
var cachePolicy = new CacheItemPolicy()
{
AbsoluteExpiration = new DateTimeOffset(DateTime.Now.AddHours(1))
};
var filePath = Path.Combine(Directory.GetCurrentDirectory(), "../../App.config");
var changeMonitor = new HostFileChangeMonitor(new string[]
{
filePath
});
//changeMonitor.NotifyOnChanged(state =>
//{
// Console.WriteLine("Has Changed");
// cache.Add(filePath, File.ReadAllText(filePath), cachePolicy);
//});
cachePolicy.ChangeMonitors.Add(changeMonitor);
return cachePolicy;
}
void InitForMemoryCache(bool isPublic, string[] filenamesArg, string[] cachekeysArg, CacheDependency dependency, DateTime utcStart) {
bool dispose = true;
try {
MemCache memCache = HttpRuntime.CacheInternal as MemCache;
_bits = new SafeBitVector32(0);
_utcLastModified = DateTime.MinValue;
IList<String> files = filenamesArg;
IList<String> keys = cachekeysArg;
if (dependency != null) {
ReadOnlyCollection<string> filePaths = (dependency._fileChangeMonitor != null) ? dependency._fileChangeMonitor.FilePaths : null;
ReadOnlyCollection<string> cacheKeys = (dependency._entryChangeMonitor != null) ? dependency._entryChangeMonitor.CacheKeys : null;
if (filePaths != null || filenamesArg != null) {
if (filePaths == null) {
files = filenamesArg;
}
else if (filenamesArg == null) {
files = filePaths;
}
else {
files = new List<String>(filenamesArg.Length + filePaths.Count);
foreach (string f in filenamesArg) {
files.Add(f);
}
foreach (string f in filePaths) {
files.Add(f);
}
}
}
if (cacheKeys != null || cachekeysArg != null) {
if (cacheKeys == null) {
keys = cachekeysArg;
}
else if (cachekeysArg == null) {
keys = cacheKeys;
}
else {
keys = new List<String>(cachekeysArg.Length + cacheKeys.Count);
foreach (string f in cachekeysArg) {
keys.Add(f);
}
foreach (string f in cacheKeys) {
keys.Add(f);
}
}
}
}
_fileChangeMonitor = (files != null) ? new HostFileChangeMonitor(files) : null;
_entryChangeMonitor = (keys != null) ? memCache.CreateCacheEntryChangeMonitor(keys, isPublic) : null;
string uniqueId = null;
if (_fileChangeMonitor != null) {
_utcLastModified = _fileChangeMonitor.LastModified.UtcDateTime;
uniqueId = _fileChangeMonitor.UniqueId;
_fileChangeMonitor.NotifyOnChanged(new OnChangedCallback(OnChangedCallback));
}
if (_entryChangeMonitor != null) {
DateTime utcLastModified = _entryChangeMonitor.LastModified.UtcDateTime;
if (utcLastModified > _utcLastModified) {
_utcLastModified = utcLastModified;
}
uniqueId += _entryChangeMonitor.UniqueId;
_entryChangeMonitor.NotifyOnChanged(new OnChangedCallback(OnChangedCallback));
}
_uniqueID = uniqueId;
#if DBG
_isUniqueIDInitialized = true;
#endif
// check if file has changed since the start time
if (utcStart < DateTime.MaxValue) {
if (_utcLastModified > utcStart
&& !(_utcLastModified - DateTime.UtcNow > FUTURE_FILETIME_BUFFER)) { // See VSWhidbey 400917
_bits[CHANGED] = true;
}
}
_bits[BASE_INIT] = true;
if (dependency != null && dependency._bits[CHANGED]) {
_bits[CHANGED] = true;
}
if (_bits[WANTS_DISPOSE] || _bits[CHANGED]) {
Debug.Trace("CacheDependencyInit", "WANTS_DISPOSE or CHANGED. InitForMemoryCache calling DisposeInternal");
DisposeInternal();
}
dispose = false;
}
finally {
if (dispose) {
_bits[BASE_INIT] = true;
Debug.Trace("CacheDependencyInit", "\n\nERROR in CacheDependency.InitForMemoryCache, calling DisposeInternal");
DisposeInternal();
}
}
}
static void Constructor_MissingFiles_Handler ()
{
HostFileChangeMonitor monitor;
PlatformID pid = Environment.OSVersion.Platform;
bool runningOnWindows = ((int) pid != 128 && pid != PlatformID.Unix && pid != PlatformID.MacOSX);
string missingFile = Path.Combine ("missing", "file", "path");
if (runningOnWindows)
missingFile = "c:\\" + missingFile;
else
missingFile = "/" + missingFile;
var paths = new List<string> {
missingFile
};
// Actually thrown by FileSystemWatcher constructor - note that the exception message suggests the file's
// parent directory is being watched, not the file itself:
//
// MonoTests.System.Runtime.Caching.HostFileChangeMonitorTest.Constructor_MissingFiles:
// System.ArgumentException : The directory name c:\missing\file is invalid.
// at System.IO.FileSystemWatcher..ctor(String path, String filter)
// at System.IO.FileSystemWatcher..ctor(String path)
// at System.Runtime.Caching.FileChangeNotificationSystem.System.Runtime.Caching.Hosting.IFileChangeNotificationSystem.StartMonitoring(String filePath, OnChangedCallback onChangedCallback, Object& state, DateTimeOffset& lastWriteTime, Int64& fileSize)
// at System.Runtime.Caching.HostFileChangeMonitor.InitDisposableMembers()
// at System.Runtime.Caching.HostFileChangeMonitor..ctor(IList`1 filePaths)
// at MonoTests.System.Runtime.Caching.HostFileChangeMonitorTest.Constructor_MissingFiles() in c:\users\grendel\documents\visual studio 2010\Projects\System.Runtime.Caching.Test\System.Runtime.Caching.Test\System.Runtime.Caching\HostFileChangeMonitorTest.cs:line 68
AssertExtensions.Throws<ArgumentException> (() => {
monitor = new HostFileChangeMonitor (paths);
}, "#A1");
if (runningOnWindows)
missingFile = "c:\\file.txt";
else
missingFile = "/file.txt";
paths.Clear ();
paths.Add (missingFile);
monitor = new HostFileChangeMonitor (paths);
Assert.AreEqual (1, monitor.FilePaths.Count, "#A2-1");
Assert.AreEqual (missingFile, monitor.FilePaths [0], "#A2-2");
Assert.AreEqual (missingFile + "701CE1722770000FFFFFFFFFFFFFFFF", monitor.UniqueId, "#A2-4");
paths.Add (missingFile);
monitor = new HostFileChangeMonitor (paths);
Assert.AreEqual (2, monitor.FilePaths.Count, "#A3-1");
Assert.AreEqual (missingFile, monitor.FilePaths [0], "#A3-2");
Assert.AreEqual (missingFile, monitor.FilePaths [1], "#A3-3");
Assert.AreEqual (missingFile + "701CE1722770000FFFFFFFFFFFFFFFF", monitor.UniqueId, "#A3-4");
}
public void UniqueId ()
{
Tuple<string, string, string, IList<string>> setup = null;
try {
setup = SetupMonitoring ();
FileInfo fi;
var monitor = new HostFileChangeMonitor (setup.Item4);
var sb = new StringBuilder ();
fi = new FileInfo (setup.Item2);
sb.AppendFormat ("{0}{1:X}{2:X}",
setup.Item2,
fi.LastWriteTimeUtc.Ticks,
fi.Length);
fi = new FileInfo (setup.Item3);
sb.AppendFormat ("{0}{1:X}{2:X}",
setup.Item3,
fi.LastWriteTimeUtc.Ticks,
fi.Length);
Assert.AreEqual (sb.ToString (), monitor.UniqueId, "#A1");
var list = new List<string> (setup.Item4);
list.Add (setup.Item1);
monitor = new HostFileChangeMonitor (list);
var di = new DirectoryInfo (setup.Item1);
sb.AppendFormat ("{0}{1:X}{2:X}",
setup.Item1,
di.LastWriteTimeUtc.Ticks,
-1L);
Assert.AreEqual (sb.ToString (), monitor.UniqueId, "#A2");
list.Add (setup.Item1);
monitor = new HostFileChangeMonitor (list);
Assert.AreEqual (sb.ToString (), monitor.UniqueId, "#A3");
} finally {
CleanupMonitoring (setup);
}
}
static void Dispose_NullState_NoStopMonitoring_Handler ()
{
Tuple<string, string, string, IList<string>> setup = null;
try {
var tns = new TestNotificationSystem ();
tns.UseNullState = true;
ObjectCache.Host = tns;
setup = SetupMonitoring ();
var monitor = new HostFileChangeMonitor (setup.Item4);
tns.FakeChanged (setup.Item2);
Assert.IsFalse (tns.StopMonitoringCalled, "#A1-1");
Assert.AreEqual (0, tns.StopMonitoringCallCount, "#A1-2");
} finally {
CleanupMonitoring (setup);
}
}
static void Constructor_Calls_StartMonitoring_Handler ()
{
Tuple<string, string, string, IList<string>> setup = null;
try {
var tns = new TestNotificationSystem ();
ObjectCache.Host = tns;
setup = SetupMonitoring ();
var monitor = new HostFileChangeMonitor (setup.Item4);
Assert.IsTrue (tns.StartMonitoringCalled, "#A1-1");
Assert.AreEqual (2, tns.StartMonitoringCallCount, "#A1-2");
} finally {
CleanupMonitoring (setup);
}
}
public void Constructor_Duplicates ()
{
HostFileChangeMonitor monitor;
PlatformID pid = Environment.OSVersion.Platform;
bool runningOnWindows = ((int) pid != 128 && pid != PlatformID.Unix && pid != PlatformID.MacOSX);
string missingFile = Path.Combine ("missing", "file", "path");
if (runningOnWindows)
missingFile = "c:\\file.txt";
else
missingFile = "/file.txt";
var paths = new List<string> {
missingFile,
missingFile
};
// Just checks if it doesn't throw any exception for dupes
monitor = new HostFileChangeMonitor (paths);
}
/// <summary>
/// 添加到缓存
/// </summary>
/// <param name="value">被缓存的数据</param>
/// <param name="cacheKey">缓存key</param>
/// <param name="filePath">依赖缓存文件的绝对路径</param>
public static void SetCache_M(this object value, string cacheKey, string dependency_filePath)
{
if (!File.Exists(dependency_filePath))
{
throw new FileNotFoundException("缓存依赖文件不存在");
}
ObjectCache cache = MemoryCache.Default;
CacheItemPolicy policy = new CacheItemPolicy();
//缓存优先级别
policy.Priority = System.Runtime.Caching.CacheItemPriority.Default;
cache.Set(cacheKey, value, policy);
//设置监视对象
HostFileChangeMonitor monitor = new HostFileChangeMonitor(new List<string>() { dependency_filePath });
//设置监视对象的回调操作
//依赖文件发生变化 即删除缓存
monitor.NotifyOnChanged(new OnChangedCallback(o =>
{
RemoveCache_M(cacheKey);
}));
//添加到监视器
policy.ChangeMonitors.Add(monitor);
}
